Mixer.



R. W. WERTH.

MIXER.

APPLICATION FILED 1ULY14. 1917.

1,293,274, Peeeneed Feb.4,1919.

:REINHARDT w. WERTH, or BROOKLYN, NEW YORK.

MIXER.

Specification of Letters Patent.

Patented Feb. 4, 1919.

Application filed July 14, 1917. Serial No. 180,568.l

To all whom t may concern.' A

Be it known that I, REINHARDT W. WERTH, a citizen of the United States, residing at Brooklyn, inthe county of Kings and State of New York, have invented new and useful Improvements in Mixers, of which the following is a specification.

This invention relates to mixers of that type generally employed for mixing various substances together and particularly to mixers of the kind employing a plurality of rotary beaters mounted upon concentric shafts for operation within a mixing receptacle, whereby the substances under treatment maybe whipped or beaten and thereby thoroughly mixed or commingled.

The primary object of the invention is to provide a mixer which is simple of construction, reliable and efficient in action, and adapted tobe manufactured and sold at a comparatively low cost, and which is particularly adapted for use in mixing cake, mayonnaise dressing, whipping cream and performing other similar mixing operations.

A further object of the invention is to provide a mixer which is readily adapted for mixing large or small quantities of 4materials, and which may be clamped to the edge of a table or other support in such a manner as to leave both hands of theoperator free to agitate the mixture and perform other work.

With these and other objects in view, the invention consists of the features of construction, combination and arrangement of' parts, hereinafter fully' described and claimed, reference being had to the accompanying drawing, in which Figure 1 is a view in side elevationshowing the mixer attached to a table or like sup-y port for use.

Fig. 2 is a top plan view of the mixer. Figs. 3, 4 and 5 are sections showing different positions -of the parts of the drive gearing.

Fig 6 is a detail section on line 6-6 of Fig. 4.

In carrying my invention into practice, I provide a mixer comprising a mixing vessel 1 adapted to be rested upon a table or other support 2 and to be removably secured to an edge thereof by a i suitable construction of clamp 3, whereby the mixer is adapted to be held firmly in a fixed position so as to allow both hands of the operator to be-left free to operate the drive gearing and to perform other incidental services.

The receptacle 1 is preferably oftapered form, being of relatively smaller diameter at the bottom than at the top, the bottom of said receptacle being saucer-shaped and merging on curved lines into the lower end of the body wall of the receptacle. Extending across the top of this receptacle is a bracket comprising a horizontal bar or base piece 4 having forked ends 5 which engage the rim edge of the vessel and are detachably secured thereto by any suitable type of fastening means. Rising from this base 0r bracket bar is a pair of upright bearing arms 6 and 7, provided with alined horizontal bearings for a drive shaft 8, the arm 6 extending to a greater height than the arm 7 and having a lateral extension 9 overhanging the bar 4.

'The bar 4 and arm 9 are provided with bearings 10 and 11 for a vertical shaft 12, which extends downwardly into the top of the receptacle 1, which shaft 12 carries at Vits upper end a lpivoted L-shaped latch 13 having an arm 14 adapted to be turned downward or upward for engagement with or disengagement from the arm 9, whereby said shaft may be left free to rotate or be locked from rotation, as hereinafter described. A hollow shaft 15 is also journaled in the bearing 10 concentric with the shaft A12, and through which shaft 15 the saidv shaft 12 extends, and the two shafts 12 and 15 carry beveled transmission gears 16 and 17 for transmitting motion to a pair of rotary beaters 18 and 19.

rllhe beaters 18 and 19 are each formed, preferably, in the main, of a single piece of wire bent into the form of a bail-shaped body which tapers to conform to the tapered body of the vessel 1, the side arms of which bail-shaped body converge slightly in a downward direction, and said beaters having their base portions extended upwardly into the space bounded thereby in the form `of looped beater arms, the inner beater 18 being provided with a pair of upstanding looped beater arms 20 and the outer beater with a pair of upstanding looped beater arms 21, the beater arms 21 being of relatively greater diameter than the beater arms` 20 and so formed as to permit each set of beater arms to pass freely through the other in the rotary motion of the beaters, as will free rotary movement.

be readily understood. The free ends of the wires of which the beaters are formed are united by head couplings 22 and 23, and these 4couplings are respectively provided with sleeves 24 and 25 receiving and engaging the downwardly projecting ends of the shafts 12 and 15 and provided with set screws 24 and 25 to engage said shafts, whereby the beaters are fixed to the respective shafts for rotation therewithr The shaft 8 is provided at one end with an actuatin crank handle 26 and'is rotatable and slidable longitudinally in its bearings in the arms 6 and 7, such sliding movements permitting the shaft to be adjusted longitudinally to two different working posltions. Formed in said shaft 8 is an annular groove 27 arranged near its outer end and adapted to be en aged by a pivoted detent 29 mounted on t e arm 7, whereby the shaft may be locked in either of its adjusted positions against longitudinal sliding movement, while it is permltted to have The opposite end of the shaft carries a double gearv embodying a large beveled gear member 30 and a smaller'gear member 31, the gear 30 having its teeth arranged for meshing engagement with the pinions 16 and 17 to normally drive the beaters 18 and 19 at high speed in opposite directions, while the gear 31 is adapted for meshing engagement with the pinion 1.6 to drive the beater 18 at low speed while the beater 19 is being driven at normal or relatively higher speed. ,The pinion 16 is adapted-to be slidably adjusted on the shaft 12 to mesh with either of the gears 30 or 31 for the purposes described or to be adjusted to a neutral position in which it lies between the upper toothed portion of the gear 30 and upper toothed 'portion of the gear 31 and out of meshing engagement with both of said gears, whereby the shaft 12 and beater 18 may be rendered stationary or inactive while the shaft 15 and beater 19 are being revolved about the same. 1

gear I16 is provided with a sleeve carrying' a set screw 32 whereby it may be fixed in its adjusted positions, and it will be understood that when the said inion 16 is adjusted in its neutral position the shaft 12 may be locked against movement by turning the arm 14 of the latch 13 down into engagement with the arm 9, thus adapting the inner beater 18 to be held fixed or locked in a stationary position while the outer beater 19 is beingrevolved. Thus it will be seen that while both beaters may be slidably rotated in opposite directions at different relative speeds, the speed of the inner beater 1'8 being controllable in the manner described, whereby efficient beatin actions in beating or whipping different su stances may be obstationary while the outer beater is operated to adapt the mixer for use in whipping o r mixing other substances requiring a specifically different kind ofY whipping or beating treatment. By holding the inner beater xed while the outer beater is rapidly revolving the substances contained within the bowl are prevented from,l flying around in the bowl and are retained in a `solid mass so that they may be more thoroughly beaten and mixed. This is a valuable feature of the invention in treating certain substances.

In order to provide for a proper intermeshing engagement of the pinion 16 with the gears 30 and 31, and proper clearance at other times or when the pinion 16 is in neutral position, the drive shaft 9 is rendered longitudinally adjustable as previously described. When said shaft is moved forwardly4 to bring the gear 30 into meshing engagement with the pinion 16, the catch 29 is engaged with the groove 27 and locks the shaft against longitudinal movement in such position. The gear teeth 30- and 31 project forwardly to equal degrees from the vdisk-like body portion of the double gear,

the space between said teeth forming an annular groove or recess, extending in rear of the, plane of said teeth. This groove or recess is adapted to receive the teeth of the gear 16, to permit said ear 16 to be slid downwardly on the sha t 12 to a neutral position, as shown in Fi 4, in which position the ear 16 and sha 12 will be out of action, a lowing said shaft to be locked from motion `by the latch' 131 It will be observed by reference to Fig. 3 that, upon releasing the catch 2,9 from engagement with the groove 27, the shaft 8 may be drawn:

rearwardly to move the gear 30-31 out of I working osition with respect to the gears 16 and 1%./ When the gear 30--31 is so retracted, the4 ear 16 may be adjusted downwardly, eit er to the neutral position shown .in Fig.' 4, or into working'engagement with the gear teeth 31, as shown in Fig. 5. After the desired adjustment of. the gear 16, the gear 30--31 may again'be moved forward to -a working position-by a sliding motion of the shaft 8, and said shaft while the beater 19 is being revolved at normal speed.

By the construction described it will be seen that the tapered or contracted form of the bottom of the vessel l and the lower ends of the beaters .provide for the reception and thorough beating of a small quantity of material in the bottom of the receptacle, so that either small or large quantities of material may be 'beaten-or mixed with like eiiciency. It will also be seen that the construction of the beaters themselves provide a plurality of beating surfaces within a` re` stricted space whereby a rapid and thorf ough whipping or beating of the mixture and combination of the ingredients will be effected. Also it will be seen that by the provision of means for rotating the beaters at diffe'rent speeds, or holding one beater fixed while the other is revolved, the mixer is rendered adaptable for whipping, beating or mixing variouskinds of substances which must be differently treated in order to secure an effective mixing action. v'A beater constructed in accordance with my invention not only embodies the desirable advantages lstated, but it is susceptible of manufacture and sale at a comparatively low cost, and by removably mounting the bracket bar 4 upon the receptacle 1, the entire beating or mixing mechanism may be removed from said receptacle, thus enabling the parts to be easily and conveniently cleaned before or after use and maintained at all times in a thoroughly sanitary condition.

- Having described ,my invention, I claim:

1. A mixer embodying a receptacle, a beater therein comprising an open ame having looped arms extending thereinto, and a second beater of similar formation havin looped arms movablethrough the loope arms of the first named beater.

2. A mixer embodying inner 'and ou'ter concentrically mounted beaters, each of said beaters comprising an open work frame having loo ed arms extending upwardly thereinto, t e looped arms of the beaters being relatively disposed for the passage of one set of arms through the other in the rotation of said beaters.

3. A mixer embodying a pair of concentrically mounted beaters, each comprising a frame forming side beating arms and having looped beaters extending upwardly into the space between said arms, one' of said beaters being arranged within the other and having its arms arranged so as to permit the arms of the other beater to pass through prising a looped frame formed of a single continuous piece of wire, one of said beaters being mounted to rotate within the other and having looped arms extending upwardly from its base into the space bounded thereby, said arms being gradually widened from bottom to top thereof, and similarly formed looped arms upon the outer beater movable through the looped arms of the inner beater in the rotation of said beaters.

6. The combination with a receptacle of conical form and having a saucer-shaped bottom of concentrically mounted rotatmg beaters arranged within said receptacle, one of said beaters being mounted to rotate within the other, each'beater comprising a looped frame having side arms inclmng correspondingly to the incline .of the side walls of the receptacle and 'arranged in proximity thereto and a bottom portion curved on an arc concentric with the curved bottom of the receptacle, the inner one of said beaters being provided with upwardly extending looped arms projecting mto the space bounded thereby, and the outer one of the rotation of the beaters through tbe loo ed arms of the inner beater.

n testimony whereof l aiiix my slgnature.

REINHARDT W. WERTH.'

.the beaters having similar arms movable in 

